Quick answer
Scan the Tadpole Depth Module Mk.1 fragments around the deeper Alien Ruins route, with current reporting pointing toward a cave below a Needler nest southeast of the Alien Ruins Research Base. Prepare the Modification Station, Celestine, Enameled Glass, and a System Chip before expecting the upgrade to happen quickly. After installing it, use the extra depth for Feedback Resonator, rare resource, and deeper base-route planning.
Field notes for the Mk.1 push
Do not chase depth with a tired vehicle
The scan route is exactly where weak power, hull damage, and sloppy parking start to matter. Repair and charge first, then go looking for the module.
Park like you plan to leave fast
Face the Tadpole toward the exit before scanning. Needlers make a slow three-point turn feel much longer than it should.
One deep goal per trip
The first run after the upgrade should solve one thing: Feedback Resonator, a rare material loop, or a base route check. New depth is tempting. Keep it boring once.
Depth Module route plan
Build the support chain first
Before chasing the module, make sure the Tadpole exists, the Modification Station is handled, and you have a clean way to repair and power the vehicle. Bring the oxygen plan too; the scan route is not the place to discover that your return habits are sloppy.
Treat Alien Ruins as the scan zone
GameSpot points the Mk.1 scan route toward a deeper Alien Ruins area, including a Needler nest route southeast of the Alien Ruins Research Base. Use landmarks and a beacon note instead of drifting through open water.
Do the scan like a hit-and-run
Park the Tadpole facing out, scan the module fragments, and leave. Needlers make slow inventory checks expensive, and this is not the trip for side mining unless the route already feels boring.
Solve the recipe chain at base
Current reporting lists Celestine, Enameled Glass, and a System Chip in the Mk.1 craft chain. That means the upgrade quietly depends on earlier Celestine, Creature Enamel, and electronics prep.
Use the new depth deliberately
Once installed, point the Tadpole toward a named objective: Feedback Resonator scans, deeper mineral loops, or a safer base route. Do not celebrate the new limit by wandering until the power cell feels nervous.
Upgrade chain
Scan
Alien Ruins
Needler nest route, beaconed and treated as hostile.
Craft
Mk.1
Celestine, Enameled Glass, System Chip, station prep.
Use
Deep routes
Feedback Resonator, rare minerals, and safer base loops.
Mk.1 prep checklist
| Check | Why it matters |
|---|---|
| Tadpole health and power | The scan route is hostile enough without starting on a weak battery or damaged hull. |
| Modification Station | The module is an upgrade craft, not just a loose pickup. |
| Celestine stock | The recipe chain points back to Alien Ruins mineral routes. |
| Enameled Glass | This pulls in the Creature Enamel and Needler Mango chain. |
| System Chip | Handle electronics before you come home with fragments and no way to finish the craft. |
Depth is permission to plan, not permission to wander
The first dive after installing the module should have one target. More depth makes bad route habits less obvious for a while, then punishes them when power, oxygen, or repairs run thin.
FAQ
Where do you find the Tadpole Depth Module in Subnautica 2?
Current reporting points to the deeper Alien Ruins route, including a cave below a Needler nest southeast of the Alien Ruins Research Base. Bring the Tadpole and mark the approach.
What do you need to craft the Tadpole Depth Module Mk.1?
Current guides list Celestine, Enameled Glass, and a System Chip as part of the Mk.1 craft chain, with the Modification Station needed for the upgrade work.
Why should I get the Depth Module before Feedback Resonator?
Feedback Resonator and similar routes sit in deeper, riskier water. The Depth Module gives the Tadpole enough margin to make those routes feel planned instead of improvised.
Should I rush the Depth Module right after building Tadpole?
No. Build repair, power, Celestine, Enameled Glass, and electronics prep first. Rushing the scan route without support wastes the time the module is supposed to save.